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macOS Sequoia is certified to Unix 03
NIX® certification provides a vendor-neutral, highly regarded, and global benchmark for identifying open operating systems. Only systems that are fully compliant and certified according to the Single UNIX Specification are qualified to use the UNIX® trademark.
The Open Group UNIX standards offer the most stable, portable and cost-effective applications development environment for a wide range of platforms from mobile devices to mainframes. UNIX certification is a trusted and open system industry standard, ensuring that products conform to the most exacting criteria for portability, compatibility, and global interoperability. Guaranteed consistency of services and behavior amongst UNIX® operating system implementations Improved portability Backward-compatibility Faster development through the increased number of standard interfaces More innovation is possible, due to the reduced time spent porting applications
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